Chemical and physical changes in matter are a classic part of elementary science curriculum. Ice, liquid, and steam, for example, are frequently used to demonstrate the way water can change forms.
But that doesn’t mean you need to stop there. Take some butter, sugar, and a curious fourth grade chef, add a dose of heat on your stove and keep track of its effects with a candy thermometer. In twenty minutes or less, you can have some mouthwatering toffee — blue ribbon candy science! Here’s how.